[Bug 216686] New: BUG: kernel NULL pointer dereference, address: 0000000000000680

[Bug 216686] New: BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

            Bug ID: 216686
           Summary: BUG: kernel NULL pointer dereference, address:
                    0000000000000680
           Product: Drivers
           Version: 2.5
    Kernel Version: 6.0.0, 6.0.3, 6.0.8, 6.1-rc3
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: frc.gabriel@gmail.com
        Regression: Yes

Hi, good morning,

I noticed few bluetooth crashes starting with kernel 6.0.0 release.

With 5.19.x I didn't see this oops and bluetooth works ok.

Kernel oops comes pretty randomly and/or takes some time to occur.

I noticed it happens more frequently when returning from suspend or when trying
to reconnect an already paired earphone headset.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1021905 (kernel=6.0.0,
firmware-linux=20210818, bios=1.19)
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1023076 (kernel=6.0.3,
firmware-linux=20221012, bios=1.19)

This kernel oops is also appearing with 6.0.8 and 6.1-rc3 from debian
experimental + firmware-linux=20221012 and lenovo bios=1.21.

Have a nice day,
Gabriel Francisco

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

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https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #1 from frc.gabriel@gmail.com ---
Created attachment 303162
  --> https://bugzilla.kernel.org/attachment.cgi?id=303162&action=edit
6.1-rc3 oops

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

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https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #2 from frc.gabriel@gmail.com ---
Created attachment 303163
  --> https://bugzilla.kernel.org/attachment.cgi?id=303163&action=edit
6.0.8 oops

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

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https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #3 from frc.gabriel@gmail.com ---
Created attachment 303164
  --> https://bugzilla.kernel.org/attachment.cgi?id=303164&action=edit
opcode failed

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

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https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #4 from frc.gabriel@gmail.com ---
Created attachment 303165
  --> https://bugzilla.kernel.org/attachment.cgi?id=303165&action=edit
suspend after oops

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

Paul Menzel (pmenzel+bugzilla.kernel.org@molgen.mpg.de) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pmenzel+bugzilla.kernel.org
                   |                            |@molgen.mpg.de

--- Comment #5 from Paul Menzel (pmenzel+bugzilla.kernel.org@molgen.mpg.de) ---
In * linux-headers-6.0.0-2-amd64: bluetooth crashes after returning from
suspend* [1] you write:

> I installed 6.0.5-1 and during the past few days seems to be working okay.

Just to avoid misunderstandings, is that outdated information?

The trace from attachment 6.1-rc3 oops is:

```
[  459.240547] usb 5-4: USB disconnect, device number 3
[  459.241253] BUG: kernel NULL pointer dereference, address: 0000000000000680
[  459.241265] #PF: supervisor read access in kernel mode
[  459.241270] #PF: error_code(0x0000) - not-present page
[  459.241275] PGD 0 P4D 0 
[  459.241282] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  459.241288] CPU: 12 PID: 973 Comm: bluetoothd Not tainted 6.1.0-0-amd64 #1 
Debian 6.1~rc3-1~exp1
[  459.241296] Hardware name: LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W (1.21
) 09/15/2022
[  459.241300] RIP: 0010:hci_send_acl+0x21/0x2f0 [bluetooth]
[  459.241515] Code: cc cc 0f 1f 80 00 00 00 00 0f 1f 44 00 00 41 57 49 89 ff
41 56 41 55 41 54 55 48 89 f5 53 48 83 ec 28 4c 8b 67 18 89 54 24 0c <4d> 8b 8c
24 80 06 00 00 4c 89 4c 24 18 66 90 0f b7 da 8b 4d 70 2b
[  459.241521] RSP: 0018:ffffa29981eafc00 EFLAGS: 00010286
[  459.241526] RAX: ffff9119fabab400 RBX: 0000000000000004 RCX:
0000000000000000
[  459.241530] RDX: 0000000000000000 RSI: ffff9119cb626f00 RDI:
ffff9119c68cfc00
[  459.241533] RBP: ffff9119cb626f00 R08: ffff911ac574fec0 R09:
000000000000000c
[  459.241535] R10: 0000000000000028 R11: 0000000000000000 R12:
0000000000000000
[  459.241538] R13: ffffa29981eafd40 R14: ffff9119cb626f00 R15:
ffff9119c68cfc00
[  459.241542] FS:  00007feffba587c0(0000) GS:ffff911fd2100000(0000)
knlGS:0000000000000000
[  459.241546] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  459.241549] CR2: 0000000000000680 CR3: 000000012219c000 CR4:
0000000000750ee0
[  459.241554] PKRU: 55555554
[  459.241557] Call Trace:
[  459.241568]  <TASK>
[  459.241573]  ? mutex_lock+0xe/0x30
[  459.241605]  l2cap_chan_send+0x12f/0xc60 [bluetooth]
[  459.241670]  ? remove_wait_queue+0x20/0x60
[  459.241677]  ? _raw_spin_unlock_irqrestore+0x23/0x40
[  459.241682]  ? bt_sock_wait_ready+0x128/0x1a0 [bluetooth]
[  459.241731]  l2cap_sock_sendmsg+0x9a/0x100 [bluetooth]
[  459.241786]  sock_sendmsg+0x5f/0x70
[  459.241796]  rfcomm_send_frame+0x62/0xa0 [rfcomm]
[  459.241814]  rfcomm_send_disc.isra.0+0x80/0xd0 [rfcomm]
[  459.241828]  __rfcomm_dlc_disconn+0x10a/0x120 [rfcomm]
[  459.241843]  __rfcomm_dlc_close+0x60/0x200 [rfcomm]
[  459.241857]  rfcomm_dlc_close+0x6a/0xb0 [rfcomm]
[  459.241871]  __rfcomm_sock_close+0x2e/0xd0 [rfcomm]
[  459.241886]  rfcomm_sock_shutdown+0x54/0xb0 [rfcomm]
[  459.241899]  rfcomm_sock_release+0x2e/0x90 [rfcomm]
[  459.241914]  __sock_release+0x3d/0xb0
[  459.241920]  sock_close+0x11/0x20
[  459.241925]  __fput+0x91/0x250
[  459.241933]  task_work_run+0x59/0x90
[  459.241942]  exit_to_user_mode_prepare+0x1cd/0x1e0
[  459.241948]  syscall_exit_to_user_mode+0x17/0x40
[  459.241960]  do_syscall_64+0x46/0xc0
[  459.241974]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[  459.241981] RIP: 0033:0x7feffc07a770
[  459.241986] Code: 0d 00 00 00 eb b2 e8 4f f7 01 00 66 2e 0f 1f 84 00 00 00
00 00 0f 1f 44 00 00 80 3d 71 1e 0e 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00
f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
[  459.241990] RSP: 002b:00007ffceb4d6ba8 EFLAGS: 00000202 ORIG_RAX:
0000000000000003
[  459.241995] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
00007feffc07a770
[  459.241998] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000028
[  459.242000] RBP: 0000000000000000 R08: 0000000000000000 R09:
0000000000000010
[  459.242003] R10: 0000000000000000 R11: 0000000000000202 R12:
0000000000000001
[  459.242005] R13: 0000555efbd88f30 R14: 00007feffc3691b0 R15:
0000555efbd7e350
[  459.242011]  </TASK>
```

Could you please attach all Linux messages, that means, the full output of
`dmesg`, and also have `sudo btmon -w /dev/shm/trace.log` running in parallel.

As you know it’s a regression, and you can reproduce it, it might be fastest to
do the following:

1.  Build bluetooth-next [2]. (Clone the source tree, copy the Debian
configuration from `/boot` to `.config`, run `make olddefconfig` and `make
localmodconfig`, disable debug info in `make menuconfig`, and then `make
bindeb-pkg` and install the generated `linux-image….deb` with `dpkg -i`.
2.  If it’s still happening, and you want faster test cycles, try to reproduce
it in QEMU by passing the USB device through.
3.  Bisect the issue with `git bisect`.

[1]: https://bugs.debian.org/1023076
[2]:
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

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frc.gabriel@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #303162|0                           |1
        is obsolete|                            |
 Attachment #303163|0                           |1
        is obsolete|                            |
 Attachment #303164|0                           |1
        is obsolete|                            |
 Attachment #303165|0                           |1
        is obsolete|                            |

--- Comment #6 from frc.gabriel@gmail.com ---
Created attachment 303168
  --> https://bugzilla.kernel.org/attachment.cgi?id=303168&action=edit
all kernel messages from syslog

I'm attaching a xz compressed file (via bugzilla), I hope that is okay.

This file contains all kernel messages from syslog (grep kernel
/var/log/syslog) from the past 2 days containing a bunch of oops for these
versions:

2022-11-13T06:31:12.982846+01:00 computer kernel: [    0.000000] Linux version
6.1.0-0-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-7)
12.2.0, GNU ld (GNU Binutils for Debian) 2.39) #1 SMP PREEMPT_DYNAMIC Debian
6.1~rc3-1~exp1 (2022-11-02)
2022-11-13T07:06:50.955682+01:00 computer kernel: [    0.000000] Linux version
6.0.0-3-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-9)
12.2.0, GNU ld (GNU Binutils for Debian) 2.39) #1 SMP PREEMPT_DYNAMIC Debian
6.0.7-1 (2022-11-05)
2022-11-13T07:55:59.669994+01:00 computer kernel: [    0.000000] Linux version
6.0.0-4-amd64 (debian-kernel@lists.debian.org) (gcc-12 (Debian 12.2.0-9)
12.2.0, GNU ld (GNU Binutils for Debian) 2.39) #1 SMP PREEMPT_DYNAMIC Debian
6.0.8-1 (2022-11-11)

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #7 from frc.gabriel@gmail.com ---
(In reply to Paul Menzel from comment #5)
> In * linux-headers-6.0.0-2-amd64: bluetooth crashes after returning from
> suspend* [1] you write:
> 
> > I installed 6.0.5-1 and during the past few days seems to be working okay.
> 
> Just to avoid misunderstandings, is that outdated information?


Hi, thanks for the quick response,

I think so, I used 6.0.5 only for a couple of days, then installed 6.1-rc3 as
soon it landed in experimental.

When writing this bug report (against 6.1-rc3) I noticed 6.0.8 was already in
unstable and tried it as well. (full dmesg for 6.0.8 at
https://bugzilla.kernel.org/attachment.cgi?id=303163&action=edit)

Both links were added just for context (because they have similar call trace)


> 
> The trace from attachment 6 [details].1-rc3 oops is:
> 
> ```
> [  459.240547] usb 5-4: USB disconnect, device number 3
> [  459.241253] BUG: kernel NULL pointer dereference, address:
> 0000000000000680
> [  459.241265] #PF: supervisor read access in kernel mode
> [  459.241270] #PF: error_code(0x0000) - not-present page
> [  459.241275] PGD 0 P4D 0 
> [  459.241282] Oops: 0000 [#1] PREEMPT SMP NOPTI
> [  459.241288] CPU: 12 PID: 973 Comm: bluetoothd Not tainted 6.1.0-0-amd64
> #1  Debian 6.1~rc3-1~exp1
> [  459.241296] Hardware name: LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W
> (1.21 ) 09/15/2022
> [  459.241300] RIP: 0010:hci_send_acl+0x21/0x2f0 [bluetooth]
> [  459.241515] Code: cc cc 0f 1f 80 00 00 00 00 0f 1f 44 00 00 41 57 49 89
> ff 41 56 41 55 41 54 55 48 89 f5 53 48 83 ec 28 4c 8b 67 18 89 54 24 0c <4d>
> 8b 8c 24 80 06 00 00 4c 89 4c 24 18 66 90 0f b7 da 8b 4d 70 2b
> [  459.241521] RSP: 0018:ffffa29981eafc00 EFLAGS: 00010286
> [  459.241526] RAX: ffff9119fabab400 RBX: 0000000000000004 RCX:
> 0000000000000000
> [  459.241530] RDX: 0000000000000000 RSI: ffff9119cb626f00 RDI:
> ffff9119c68cfc00
> [  459.241533] RBP: ffff9119cb626f00 R08: ffff911ac574fec0 R09:
> 000000000000000c
> [  459.241535] R10: 0000000000000028 R11: 0000000000000000 R12:
> 0000000000000000
> [  459.241538] R13: ffffa29981eafd40 R14: ffff9119cb626f00 R15:
> ffff9119c68cfc00
> [  459.241542] FS:  00007feffba587c0(0000) GS:ffff911fd2100000(0000)
> knlGS:0000000000000000
> [  459.241546] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [  459.241549] CR2: 0000000000000680 CR3: 000000012219c000 CR4:
> 0000000000750ee0
> [  459.241554] PKRU: 55555554
> [  459.241557] Call Trace:
> [  459.241568]  <TASK>
> [  459.241573]  ? mutex_lock+0xe/0x30
> [  459.241605]  l2cap_chan_send+0x12f/0xc60 [bluetooth]
> [  459.241670]  ? remove_wait_queue+0x20/0x60
> [  459.241677]  ? _raw_spin_unlock_irqrestore+0x23/0x40
> [  459.241682]  ? bt_sock_wait_ready+0x128/0x1a0 [bluetooth]
> [  459.241731]  l2cap_sock_sendmsg+0x9a/0x100 [bluetooth]
> [  459.241786]  sock_sendmsg+0x5f/0x70
> [  459.241796]  rfcomm_send_frame+0x62/0xa0 [rfcomm]
> [  459.241814]  rfcomm_send_disc.isra.0+0x80/0xd0 [rfcomm]
> [  459.241828]  __rfcomm_dlc_disconn+0x10a/0x120 [rfcomm]
> [  459.241843]  __rfcomm_dlc_close+0x60/0x200 [rfcomm]
> [  459.241857]  rfcomm_dlc_close+0x6a/0xb0 [rfcomm]
> [  459.241871]  __rfcomm_sock_close+0x2e/0xd0 [rfcomm]
> [  459.241886]  rfcomm_sock_shutdown+0x54/0xb0 [rfcomm]
> [  459.241899]  rfcomm_sock_release+0x2e/0x90 [rfcomm]
> [  459.241914]  __sock_release+0x3d/0xb0
> [  459.241920]  sock_close+0x11/0x20
> [  459.241925]  __fput+0x91/0x250
> [  459.241933]  task_work_run+0x59/0x90
> [  459.241942]  exit_to_user_mode_prepare+0x1cd/0x1e0
> [  459.241948]  syscall_exit_to_user_mode+0x17/0x40
> [  459.241960]  do_syscall_64+0x46/0xc0
> [  459.241974]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
> [  459.241981] RIP: 0033:0x7feffc07a770
> [  459.241986] Code: 0d 00 00 00 eb b2 e8 4f f7 01 00 66 2e 0f 1f 84 00 00
> 00 00 00 0f 1f 44 00 00 80 3d 71 1e 0e 00 00 74 17 b8 03 00 00 00 0f 05 <48>
> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
> [  459.241990] RSP: 002b:00007ffceb4d6ba8 EFLAGS: 00000202 ORIG_RAX:
> 0000000000000003
> [  459.241995] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
> 00007feffc07a770
> [  459.241998] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
> 0000000000000028
> [  459.242000] RBP: 0000000000000000 R08: 0000000000000000 R09:
> 0000000000000010
> [  459.242003] R10: 0000000000000000 R11: 0000000000000202 R12:
> 0000000000000001
> [  459.242005] R13: 0000555efbd88f30 R14: 00007feffc3691b0 R15:
> 0000555efbd7e350
> [  459.242011]  </TASK>
> ```
> 
> Could you please attach all Linux messages, that means, the full output of
> `dmesg`, and also have `sudo btmon -w /dev/shm/trace.log` running in
> parallel.

I triggered the bug while running btmon, but the computer become unresponsive
and freezes completely and I'm not even sure if it get into syslog. I will try
later to have btmon writing somewhere else so I don't lose the file.

Meanwhile, I attached all kernel messages I could get from `grep kernel
/var/log/syslog` in a xz file attached at
https://bugzilla.kernel.org/attachment.cgi?id=303168


> 
> As you know it’s a regression, and you can reproduce it, it might be fastest
> to do the following:
> 
> 1.  Build bluetooth-next [2]. (Clone the source tree, copy the Debian
> configuration from `/boot` to `.config`, run `make olddefconfig` and `make
> localmodconfig`, disable debug info in `make menuconfig`, and then `make
> bindeb-pkg` and install the generated `linux-image….deb` with `dpkg -i`.
> 2.  If it’s still happening, and you want faster test cycles, try to
> reproduce it in QEMU by passing the USB device through.
> 3.  Bisect the issue with `git bisect`.
> 
> [1]: https://bugs.debian.org/1023076
> [2]:
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git

Sure, I will try that too later today.

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #8 from frc.gabriel@gmail.com ---
(In reply to frc.gabriel from comment #7)
> (In reply to Paul Menzel from comment #5)
> > In * linux-headers-6.0.0-2-amd64: bluetooth crashes after returning from
> > suspend* [1] you write:
> > 
> > > I installed 6.0.5-1 and during the past few days seems to be working
> okay.
> > 
> > Just to avoid misunderstandings, is that outdated information?
> 
> 
> Hi, thanks for the quick response,
> 
> I think so, I used 6.0.5 only for a couple of days, then installed 6.1-rc3
> as soon it landed in experimental.
> 
> When writing this bug report (against 6.1-rc3) I noticed 6.0.8 was already
> in unstable and tried it as well. (full dmesg for 6.0.8 at
> https://bugzilla.kernel.org/attachment.cgi?id=303163&action=edit)
> 
> Both links were added just for context (because they have similar call trace)
> 
> 
> > 
> > The trace from attachment 6 [details].1-rc3 oops is:
> > 
> > ```
> > [  459.240547] usb 5-4: USB disconnect, device number 3
> > [  459.241253] BUG: kernel NULL pointer dereference, address:
> > 0000000000000680
> > [  459.241265] #PF: supervisor read access in kernel mode
> > [  459.241270] #PF: error_code(0x0000) - not-present page
> > [  459.241275] PGD 0 P4D 0 
> > [  459.241282] Oops: 0000 [#1] PREEMPT SMP NOPTI
> > [  459.241288] CPU: 12 PID: 973 Comm: bluetoothd Not tainted 6.1.0-0-amd64
> > #1  Debian 6.1~rc3-1~exp1
> > [  459.241296] Hardware name: LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W
> > (1.21 ) 09/15/2022
> > [  459.241300] RIP: 0010:hci_send_acl+0x21/0x2f0 [bluetooth]
> > [  459.241515] Code: cc cc 0f 1f 80 00 00 00 00 0f 1f 44 00 00 41 57 49 89
> > ff 41 56 41 55 41 54 55 48 89 f5 53 48 83 ec 28 4c 8b 67 18 89 54 24 0c
> <4d>
> > 8b 8c 24 80 06 00 00 4c 89 4c 24 18 66 90 0f b7 da 8b 4d 70 2b
> > [  459.241521] RSP: 0018:ffffa29981eafc00 EFLAGS: 00010286
> > [  459.241526] RAX: ffff9119fabab400 RBX: 0000000000000004 RCX:
> > 0000000000000000
> > [  459.241530] RDX: 0000000000000000 RSI: ffff9119cb626f00 RDI:
> > ffff9119c68cfc00
> > [  459.241533] RBP: ffff9119cb626f00 R08: ffff911ac574fec0 R09:
> > 000000000000000c
> > [  459.241535] R10: 0000000000000028 R11: 0000000000000000 R12:
> > 0000000000000000
> > [  459.241538] R13: ffffa29981eafd40 R14: ffff9119cb626f00 R15:
> > ffff9119c68cfc00
> > [  459.241542] FS:  00007feffba587c0(0000) GS:ffff911fd2100000(0000)
> > knlGS:0000000000000000
> > [  459.241546] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> > [  459.241549] CR2: 0000000000000680 CR3: 000000012219c000 CR4:
> > 0000000000750ee0
> > [  459.241554] PKRU: 55555554
> > [  459.241557] Call Trace:
> > [  459.241568]  <TASK>
> > [  459.241573]  ? mutex_lock+0xe/0x30
> > [  459.241605]  l2cap_chan_send+0x12f/0xc60 [bluetooth]
> > [  459.241670]  ? remove_wait_queue+0x20/0x60
> > [  459.241677]  ? _raw_spin_unlock_irqrestore+0x23/0x40
> > [  459.241682]  ? bt_sock_wait_ready+0x128/0x1a0 [bluetooth]
> > [  459.241731]  l2cap_sock_sendmsg+0x9a/0x100 [bluetooth]
> > [  459.241786]  sock_sendmsg+0x5f/0x70
> > [  459.241796]  rfcomm_send_frame+0x62/0xa0 [rfcomm]
> > [  459.241814]  rfcomm_send_disc.isra.0+0x80/0xd0 [rfcomm]
> > [  459.241828]  __rfcomm_dlc_disconn+0x10a/0x120 [rfcomm]
> > [  459.241843]  __rfcomm_dlc_close+0x60/0x200 [rfcomm]
> > [  459.241857]  rfcomm_dlc_close+0x6a/0xb0 [rfcomm]
> > [  459.241871]  __rfcomm_sock_close+0x2e/0xd0 [rfcomm]
> > [  459.241886]  rfcomm_sock_shutdown+0x54/0xb0 [rfcomm]
> > [  459.241899]  rfcomm_sock_release+0x2e/0x90 [rfcomm]
> > [  459.241914]  __sock_release+0x3d/0xb0
> > [  459.241920]  sock_close+0x11/0x20
> > [  459.241925]  __fput+0x91/0x250
> > [  459.241933]  task_work_run+0x59/0x90
> > [  459.241942]  exit_to_user_mode_prepare+0x1cd/0x1e0
> > [  459.241948]  syscall_exit_to_user_mode+0x17/0x40
> > [  459.241960]  do_syscall_64+0x46/0xc0
> > [  459.241974]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
> > [  459.241981] RIP: 0033:0x7feffc07a770
> > [  459.241986] Code: 0d 00 00 00 eb b2 e8 4f f7 01 00 66 2e 0f 1f 84 00 00
> > 00 00 00 0f 1f 44 00 00 80 3d 71 1e 0e 00 00 74 17 b8 03 00 00 00 0f 05
> <48>
> > 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c
> > [  459.241990] RSP: 002b:00007ffceb4d6ba8 EFLAGS: 00000202 ORIG_RAX:
> > 0000000000000003
> > [  459.241995] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
> > 00007feffc07a770
> > [  459.241998] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
> > 0000000000000028
> > [  459.242000] RBP: 0000000000000000 R08: 0000000000000000 R09:
> > 0000000000000010
> > [  459.242003] R10: 0000000000000000 R11: 0000000000000202 R12:
> > 0000000000000001
> > [  459.242005] R13: 0000555efbd88f30 R14: 00007feffc3691b0 R15:
> > 0000555efbd7e350
> > [  459.242011]  </TASK>
> > ```
> > 
> > Could you please attach all Linux messages, that means, the full output of
> > `dmesg`, and also have `sudo btmon -w /dev/shm/trace.log` running in
> > parallel.
> 
> I triggered the bug while running btmon, but the computer become
> unresponsive and freezes completely and I'm not even sure if it get into
> syslog. I will try later to have btmon writing somewhere else so I don't
> lose the file.
> 
> Meanwhile, I attached all kernel messages I could get from `grep kernel
> /var/log/syslog` in a xz file attached at
> https://bugzilla.kernel.org/attachment.cgi?id=303168
> 
> 
> > 
> > As you know it’s a regression, and you can reproduce it, it might be
> fastest
> > to do the following:
> > 
> > 1.  Build bluetooth-next [2]. (Clone the source tree, copy the Debian
> > configuration from `/boot` to `.config`, run `make olddefconfig` and `make
> > localmodconfig`, disable debug info in `make menuconfig`, and then `make
> > bindeb-pkg` and install the generated `linux-image….deb` with `dpkg -i`.
> > 2.  If it’s still happening, and you want faster test cycles, try to
> > reproduce it in QEMU by passing the USB device through.
> > 3.  Bisect the issue with `git bisect`.
> > 
> > [1]: https://bugs.debian.org/1023076
> > [2]:
> >
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
> 
> Sure, I will try that too later today.

Ah, I forgot to share how I reproduce this bug:


While a video is playing in firefox:
  Once a while I disconnect and connect the earphone headset via
gnome-control-center.
  I connect my android cellphone to the earphone headset while it is still
connected to computer, "forcing" a disconnection.
All that while still keeping gnome-control-center bluetooth page open/scanning.

After a few cycles, of connect+disconnect the earphone headset shows as
"connected" in gnome-control-center, but no audio sink is available.

At this point, closing the lid or switching bluetooth off (via
gnome-control-center toggle) I get this message in dmesg:

```
2022-11-13T08:04:07.733635+01:00 computer kernel: [  553.697726] general
protection fault, probably for non-canonical address 0xa0ffff9bb2249beb: 0000
[#1] PREEMPT SMP NOPTI
2022-11-13T08:04:07.733710+01:00 computer kernel: [  553.697742] CPU: 7 PID:
933 Comm: bluetoothd Not tainted 6.0.0-4-amd64 #1  Debian 6.0.8-1
2022-11-13T08:04:07.733716+01:00 computer kernel: [  553.697752] Hardware name:
LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W (1.21 ) 09/15/2022
2022-11-13T08:04:07.733720+01:00 computer kernel: [  553.697756] RIP:
0010:hci_send_acl+0x4a/0x2f0 [bluetooth]
2022-11-13T08:04:07.733724+01:00 computer kernel: [  553.697825] Code: 0c 4d 8b
8c 24 80 06 00 00 4c 89 4c 24 18 66 90 0f b7 da 8b 4d 70 2b 4d 74 c6 45 28 02
89 4d 70 41 89 cd c7 45 74 00 00 00 00 <41> 0f b6 51 43 84 d2 0f 84 0e 02 00 00
80 fa 01 0f 84 81 00 00 00
2022-11-13T08:04:07.733728+01:00 computer kernel: [  553.697831] RSP:
0018:ffffbd1fc1bc7c00 EFLAGS: 00010202
2022-11-13T08:04:07.733729+01:00 computer kernel: [  553.697839] RAX:
ffff9bb240599600 RBX: 0000000000000002 RCX: 0000000000000008
2022-11-13T08:04:07.733733+01:00 computer kernel: [  553.697844] RDX:
0000000000000002 RSI: ffff9bb1c30ea600 RDI: ffff9bb1c805fcc0
2022-11-13T08:04:07.733736+01:00 computer kernel: [  553.697847] RBP:
ffff9bb1c30ea600 R08: ffff9bb2378ba2c0 R09: a0ffff9bb2249ba8
2022-11-13T08:04:07.733740+01:00 computer kernel: [  553.697851] R10:
0000000000000029 R11: 0000000000000000 R12: ffff9bb2249ba1c1
2022-11-13T08:04:07.733743+01:00 computer kernel: [  553.697854] R13:
0000000000000008 R14: ffff9bb1c30ea600 R15: ffff9bb1c805fcc0
2022-11-13T08:04:07.733746+01:00 computer kernel: [  553.697858] FS: 
00007f6c939e47c0(0000) GS:ffff9bb7edfc0000(0000) knlGS:0000000000000000
2022-11-13T08:04:07.733748+01:00 computer kernel: [  553.697863] CS:  0010 DS:
0000 ES: 0000 CR0: 0000000080050033
2022-11-13T08:04:07.733824+01:00 computer kernel: [  553.697868] CR2:
00007fac2212d000 CR3: 0000000168dc2000 CR4: 0000000000750ee0
2022-11-13T08:04:07.733830+01:00 computer kernel: [  553.697872] PKRU: 55555554
2022-11-13T08:04:07.733833+01:00 computer kernel: [  553.697875] Call Trace:
2022-11-13T08:04:07.733836+01:00 computer kernel: [  553.697881]  <TASK>
2022-11-13T08:04:07.733839+01:00 computer kernel: [  553.697885]  ?
mutex_lock+0xe/0x30
2022-11-13T08:04:07.733843+01:00 computer kernel: [  553.697901] 
l2cap_chan_send+0x12f/0xc60 [bluetooth]
2022-11-13T08:04:07.733846+01:00 computer kernel: [  553.697977]  ?
remove_wait_queue+0x20/0x60
2022-11-13T08:04:07.733849+01:00 computer kernel: [  553.697987]  ?
_raw_spin_unlock_irqrestore+0x23/0x40
2022-11-13T08:04:07.733852+01:00 computer kernel: [  553.697995]  ?
bt_sock_wait_ready+0x128/0x1a0 [bluetooth]
2022-11-13T08:04:07.733855+01:00 computer kernel: [  553.698050] 
l2cap_sock_sendmsg+0x9a/0x100 [bluetooth]
2022-11-13T08:04:07.733858+01:00 computer kernel: [  553.698114] 
sock_sendmsg+0x5f/0x70
2022-11-13T08:04:07.733861+01:00 computer kernel: [  553.698125] 
rfcomm_send_frame+0x62/0xa0 [rfcomm]
2022-11-13T08:04:07.733864+01:00 computer kernel: [  553.698141] 
rfcomm_send_disc.isra.0+0x80/0xd0 [rfcomm]
2022-11-13T08:04:07.733867+01:00 computer kernel: [  553.698154] 
__rfcomm_dlc_disconn+0x10a/0x120 [rfcomm]
2022-11-13T08:04:07.733870+01:00 computer kernel: [  553.698166] 
__rfcomm_dlc_close+0x60/0x200 [rfcomm]
2022-11-13T08:04:07.733872+01:00 computer kernel: [  553.698179] 
rfcomm_dlc_close+0x6a/0xb0 [rfcomm]
2022-11-13T08:04:07.733875+01:00 computer kernel: [  553.698190] 
__rfcomm_sock_close+0x2e/0xd0 [rfcomm]
2022-11-13T08:04:07.733878+01:00 computer kernel: [  553.698203] 
rfcomm_sock_shutdown+0x54/0xb0 [rfcomm]
2022-11-13T08:04:07.733882+01:00 computer kernel: [  553.698215] 
rfcomm_sock_release+0x2e/0x90 [rfcomm]
2022-11-13T08:04:07.733885+01:00 computer kernel: [  553.698227] 
__sock_release+0x3d/0xb0
2022-11-13T08:04:07.733888+01:00 computer kernel: [  553.698234] 
sock_close+0x11/0x20
2022-11-13T08:04:07.733890+01:00 computer kernel: [  553.698239] 
__fput+0x91/0x250
2022-11-13T08:04:07.733892+01:00 computer kernel: [  553.698248] 
task_work_run+0x5c/0x90
2022-11-13T08:04:07.733895+01:00 computer kernel: [  553.698257] 
exit_to_user_mode_prepare+0x1cd/0x1e0
2022-11-13T08:04:07.733898+01:00 computer kernel: [  553.698264] 
syscall_exit_to_user_mode+0x17/0x40
2022-11-13T08:04:07.733901+01:00 computer kernel: [  553.698271] 
do_syscall_64+0x46/0xc0
2022-11-13T08:04:07.733904+01:00 computer kernel: [  553.698280] 
entry_SYSCALL_64_after_hwframe+0x63/0xcd
2022-11-13T08:04:07.733907+01:00 computer kernel: [  553.698289] RIP:
0033:0x7f6c94006770
2022-11-13T08:04:07.733910+01:00 computer kernel: [  553.698295] Code: 0d 00 00
00 eb b2 e8 4f f7 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 80 3d 71
1e 0e 00 00 74 17 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00
00 00 00 48 83 ec 18 89 7c
2022-11-13T08:04:07.733914+01:00 computer kernel: [  553.698300] RSP:
002b:00007ffc65ad5da8 EFLAGS: 00000202 ORIG_RAX: 0000000000000003
2022-11-13T08:04:07.733917+01:00 computer kernel: [  553.698306] RAX:
0000000000000000 RBX: 0000000000000000 RCX: 00007f6c94006770
2022-11-13T08:04:07.733920+01:00 computer kernel: [  553.698310] RDX:
0000000000000000 RSI: 0000000000000000 RDI: 0000000000000029
2022-11-13T08:04:07.733923+01:00 computer kernel: [  553.698313] RBP:
0000000000000000 R08: 0000000000000000 R09: 0000000000000010
2022-11-13T08:04:07.733925+01:00 computer kernel: [  553.698316] R10:
0000000000000000 R11: 0000000000000202 R12: 0000000000000001
2022-11-13T08:04:07.733929+01:00 computer kernel: [  553.698319] R13:
00005564dd86f1f0 R14: 00005564dd86d940 R15: 00005564dd876610
2022-11-13T08:04:07.733932+01:00 computer kernel: [  553.698326]  </TASK>
2022-11-13T08:04:07.733934+01:00 computer kernel: [  553.698328] Modules linked
in: xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat nf_conntrack_netlink
nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user xfrm_algo xt_addrtype
nft_compat nf_tables libcrc32c nfnetlink br_netfilter bridge stp llc
nvme_fabrics uinput ctr ccm rfcomm snd_seq_dummy snd_hrtimer snd_seq
snd_seq_device cmac algif_hash algif_skcipher af_alg cpufreq_ondemand
cpufreq_powersave cpufreq_conservative zstd cpufreq_userspace zstd_compress
overlay zram qrtr bnep zsmalloc binfmt_misc nls_ascii nls_cp437 vfat
intel_rapl_msr fat intel_rapl_common rtw89_8852ae rtw89_8852a btusb btrtl btbcm
rtw89_pci btintel rtw89_core btmtk snd_acp3x_pdm_dma snd_acp3x_rn snd_soc_dmic
bluetooth snd_soc_core snd_ctl_led snd_compress snd_hda_codec_realtek mac80211
edac_mce_amd snd_hda_codec_generic snd_hda_codec_hdmi jitterentropy_rng
uvcvideo snd_hda_intel snd_intel_dspcfg videobuf2_vmalloc videobuf2_memops
snd_intel_sdw_acpi kvm_amd videobuf2_v4l2 drbg libarc4 videobuf2_common
ansi_cprng
2022-11-13T08:04:07.733938+01:00 computer kernel: [  553.698439]  snd_hda_codec
kvm snd_hda_core videodev snd_hwdep snd_pci_acp6x ecdh_generic thinkpad_acpi
irqbypass snd_pci_acp5x cfg80211 rapl mc ecc wmi_bmof pcspkr snd_rn_pci_acp3x
snd_pcm snd_acp_config nvram ccp k10temp platform_profile ucsi_acpi
snd_soc_acpi typec_ucsi snd_timer sp5100_tco ledtrig_audio snd_pci_acp3x
rng_core watchdog snd roles soundcore typec rfkill ac joydev evdev serio_raw
amd_pstate msr parport_pc ppdev lp parport fuse efi_pstore configfs efivarfs
ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic dm_crypt
dm_mod amdgpu gpu_sched drm_buddy i2c_algo_bit drm_display_helper crc32_pclmul
crc32c_intel cec rc_core drm_ttm_helper ttm ghash_clmulni_intel rtsx_pci_sdmmc
xhci_pci drm_kms_helper nvme mmc_core xhci_hcd r8169 nvme_core aesni_intel drm
realtek t10_pi mdio_devres usbcore crypto_simd psmouse libphy
crc64_rocksoft_generic cryptd crc64_rocksoft crc_t10dif rtsx_pci i2c_piix4
crct10dif_generic crct10dif_pclmul usb_common crc64 crct10dif_common wmi
2022-11-13T08:04:07.733946+01:00 computer kernel: [  553.698572]  battery video
i2c_scmi button sha512_ssse3 sha512_generic
2022-11-13T08:04:07.733949+01:00 computer kernel: [  553.698586] ---[ end trace
0000000000000000 ]---

```

After this message is printed, closing the lid and opening it again I get these
(suspend (s2idle) and (deep)):

```
2022-11-13T08:55:19.687599+01:00 computer kernel: [ 3625.820979] PM: suspend
exit
2022-11-13T08:55:19.687610+01:00 computer kernel: [ 3625.821050] PM: suspend
entry (s2idle)
2022-11-13T08:55:39.731257+01:00 computer kernel: [ 3625.857013] Filesystems
sync: 0.035 seconds
2022-11-13T08:55:39.731469+01:00 computer kernel: [ 3625.857914] Freezing user
space processes ... 
2022-11-13T08:55:39.731480+01:00 computer kernel: [ 3625.924634] r8169
0000:05:00.0 enp5s0: Link is Down
2022-11-13T08:55:39.731488+01:00 computer kernel: [ 3645.867121] 
2022-11-13T08:55:39.731492+01:00 computer kernel: [ 3645.867138] Freezing of
tasks failed after 20.009 seconds (1 tasks refusing to freeze, wq_busy=0):
2022-11-13T08:55:39.731499+01:00 computer kernel: [ 3645.867211]
task:bluetoothd      state:D stack:    0 pid: 6502 ppid:     1 flags:0x00000006
2022-11-13T08:55:39.731505+01:00 computer kernel: [ 3645.867230] Call Trace:
2022-11-13T08:55:39.731511+01:00 computer kernel: [ 3645.867237]  <TASK>
2022-11-13T08:55:39.731516+01:00 computer kernel: [ 3645.867249] 
__schedule+0x33e/0xa10
2022-11-13T08:55:39.731521+01:00 computer kernel: [ 3645.867281] 
schedule+0x5d/0xe0
2022-11-13T08:55:39.731569+01:00 computer kernel: [ 3645.867291] 
schedule_preempt_disabled+0x14/0x30
2022-11-13T08:55:39.731577+01:00 computer kernel: [ 3645.867299] 
__mutex_lock.constprop.0+0x3b4/0x700
2022-11-13T08:55:39.731582+01:00 computer kernel: [ 3645.867312] 
rfcomm_dlc_open+0x3e/0x360 [rfcomm]
2022-11-13T08:55:39.731588+01:00 computer kernel: [ 3645.867339] 
rfcomm_sock_connect+0xd8/0x130 [rfcomm]
2022-11-13T08:55:39.731593+01:00 computer kernel: [ 3645.867358] 
__sys_connect+0xa4/0xd0
2022-11-13T08:55:39.731683+01:00 computer kernel: [ 3645.867376] 
__x64_sys_connect+0x14/0x20
2022-11-13T08:55:39.731693+01:00 computer kernel: [ 3645.867385] 
do_syscall_64+0x3a/0xc0
2022-11-13T08:55:39.731700+01:00 computer kernel: [ 3645.867399] 
entry_SYSCALL_64_after_hwframe+0x63/0xcd
2022-11-13T08:55:39.731705+01:00 computer kernel: [ 3645.867413] RIP:
0033:0x7f8d074bf470
2022-11-13T08:55:39.731711+01:00 computer kernel: [ 3645.867423] RSP:
002b:00007ffe397682c8 EFLAGS: 00000202 ORIG_RAX: 000000000000002a
2022-11-13T08:55:39.731717+01:00 computer kernel: [ 3645.867434] RAX:
ffffffffffffffda RBX: 00007ffe397684c0 RCX: 00007f8d074bf470
2022-11-13T08:55:39.731723+01:00 computer kernel: [ 3645.867440] RDX:
000000000000000a RSI: 00007ffe397682e0 RDI: 0000000000000029
2022-11-13T08:55:39.731727+01:00 computer kernel: [ 3645.867446] RBP:
000055ec2510b410 R08: 000000000000001f R09: 000055ec250d01d0
2022-11-13T08:55:39.731732+01:00 computer kernel: [ 3645.867451] R10:
0000000000001000 R11: 0000000000000202 R12: 0000000000000000
2022-11-13T08:55:39.731737+01:00 computer kernel: [ 3645.867457] R13:
000055ec250d07f0 R14: 000055ec233329f0 R15: 00007ffe397682e0
2022-11-13T08:55:39.731741+01:00 computer kernel: [ 3645.867466]  </TASK>
2022-11-13T08:55:39.731745+01:00 computer kernel: [ 3645.867475] 
2022-11-13T08:55:39.731751+01:00 computer kernel: [ 3645.867479] OOM killer
enabled.
2022-11-13T08:55:39.738773+01:00 computer kernel: [ 3645.867483] Restarting
tasks ... done.
2022-11-13T08:55:39.738807+01:00 computer kernel: [ 3645.873016] random: crng
reseeded on system resumption
2022-11-13T08:55:39.863568+01:00 computer kernel: [ 3645.996885] PM: suspend
exit
2022-11-13T08:55:39.939555+01:00 computer kernel: [ 3646.075416] PM: suspend
entry (deep)
2022-11-13T08:55:39.976001+01:00 computer kernel: [ 3646.112036] Filesystems
sync: 0.036 seconds
2022-11-13T08:55:59.985387+01:00 computer kernel: [ 3646.113861] Freezing user
space processes ... 
2022-11-13T08:55:59.985459+01:00 computer kernel: [ 3666.121238] Freezing of
tasks failed after 20.007 seconds (1 tasks refusing to freeze, wq_busy=0):
2022-11-13T08:55:59.985470+01:00 computer kernel: [ 3666.121308]
task:bluetoothd      state:D stack:    0 pid: 6502 ppid:     1 flags:0x00000006
2022-11-13T08:55:59.985476+01:00 computer kernel: [ 3666.121325] Call Trace:
2022-11-13T08:55:59.985481+01:00 computer kernel: [ 3666.121331]  <TASK>
2022-11-13T08:55:59.985486+01:00 computer kernel: [ 3666.121343] 
__schedule+0x33e/0xa10
2022-11-13T08:55:59.985494+01:00 computer kernel: [ 3666.121374] 
schedule+0x5d/0xe0
2022-11-13T08:55:59.985499+01:00 computer kernel: [ 3666.121383] 
schedule_preempt_disabled+0x14/0x30
2022-11-13T08:55:59.985544+01:00 computer kernel: [ 3666.121392] 
__mutex_lock.constprop.0+0x3b4/0x700
2022-11-13T08:55:59.985550+01:00 computer kernel: [ 3666.121404] 
rfcomm_dlc_open+0x3e/0x360 [rfcomm]
2022-11-13T08:55:59.985556+01:00 computer kernel: [ 3666.121431] 
rfcomm_sock_connect+0xd8/0x130 [rfcomm]
2022-11-13T08:55:59.985561+01:00 computer kernel: [ 3666.121449] 
__sys_connect+0xa4/0xd0
2022-11-13T08:55:59.985568+01:00 computer kernel: [ 3666.121467] 
__x64_sys_connect+0x14/0x20
2022-11-13T08:55:59.985574+01:00 computer kernel: [ 3666.121475] 
do_syscall_64+0x3a/0xc0
2022-11-13T08:55:59.985579+01:00 computer kernel: [ 3666.121489] 
entry_SYSCALL_64_after_hwframe+0x63/0xcd
2022-11-13T08:55:59.985584+01:00 computer kernel: [ 3666.121502] RIP:
0033:0x7f8d074bf470
2022-11-13T08:55:59.985588+01:00 computer kernel: [ 3666.121512] RSP:
002b:00007ffe397682c8 EFLAGS: 00000202 ORIG_RAX: 000000000000002a
2022-11-13T08:55:59.985593+01:00 computer kernel: [ 3666.121522] RAX:
ffffffffffffffda RBX: 00007ffe397684c0 RCX: 00007f8d074bf470
2022-11-13T08:55:59.985599+01:00 computer kernel: [ 3666.121528] RDX:
000000000000000a RSI: 00007ffe397682e0 RDI: 0000000000000029
2022-11-13T08:55:59.985604+01:00 computer kernel: [ 3666.121534] RBP:
000055ec2510b410 R08: 000000000000001f R09: 000055ec250d01d0
2022-11-13T08:55:59.985610+01:00 computer kernel: [ 3666.121539] R10:
0000000000001000 R11: 0000000000000202 R12: 0000000000000000
2022-11-13T08:55:59.985615+01:00 computer kernel: [ 3666.121544] R13:
000055ec250d07f0 R14: 000055ec233329f0 R15: 00007ffe397682e0
2022-11-13T08:55:59.985619+01:00 computer kernel: [ 3666.121553]  </TASK>
2022-11-13T08:55:59.985624+01:00 computer kernel: [ 3666.121562] 
2022-11-13T08:55:59.985628+01:00 computer kernel: [ 3666.121565] OOM killer
enabled.
2022-11-13T08:55:59.991624+01:00 computer kernel: [ 3666.121569] Restarting
tasks ... done.
2022-11-13T08:55:59.991654+01:00 computer kernel: [ 3666.125306] random: crng
reseeded on system resumption
2022-11-13T08:56:00.023913+01:00 computer kernel: [ 3666.156324] Generic FE-GE
Realtek PHY r8169-0-200:00: attached PHY driver
(mii_bus:phy_addr=r8169-0-200:00, irq=MAC)
2022-11-13T08:56:00.115588+01:00 computer kernel: [ 3666.248877] PM: suspend
exit
2022-11-13T08:56:00.115604+01:00 computer kernel: [ 3666.248972] PM: suspend
entry (s2idle)
```

Best,
Gabriel Francisco

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #9 from frc.gabriel@gmail.com ---
Created attachment 303169
  --> https://bugzilla.kernel.org/attachment.cgi?id=303169&action=edit
kernel messages from kern.log

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #10 from frc.gabriel@gmail.com ---
Created attachment 303170
  --> https://bugzilla.kernel.org/attachment.cgi?id=303170&action=edit
btmon file when the computer crashed running kernel from bluetooth-next

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #11 from frc.gabriel@gmail.com ---
Hi, these two attachments are when running the kernel from
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
(bluetooth-next branch).

I will try master branch.

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[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #12 from frc.gabriel@gmail.com ---
Created attachment 303171
  --> https://bugzilla.kernel.org/attachment.cgi?id=303171&action=edit
dmesg bluetooth-next master branch HEAD

Triggering the bug while running btmon with the HEAD of master branch from
bluetooth-next does not renders the computer unusable, but
disconnecting+connecting the the headset is not as smooth compared with
bluetooth-next branch (which freezes computer).

```
[  301.300526] PM: suspend exit
[  301.301469] Bluetooth: hci0: RTL: rom_version status=0 version=1
[  301.301473] Bluetooth: hci0: RTL: loading rtl_bt/rtl8852au_fw.bin
[  301.301583] Bluetooth: hci0: RTL: loading rtl_bt/rtl8852au_config.bin
[  301.301640] Bluetooth: hci0: RTL: cfg_sz 6, total sz 47155
[  301.393319] Generic FE-GE Realtek PHY r8169-0-200:00: attached PHY driver
(mii_bus:phy_addr=r8169-0-200:00, irq=MAC)
[  301.429363] usb 5-3: new full-speed USB device number 5 using xhci_hcd
[  301.508834] psmouse serio1: synaptics: queried max coordinates: x [..5678],
y [..4694]
[  301.521632] r8169 0000:02:00.0 enp2s0f0: Link is Down
[  301.547243] psmouse serio1: synaptics: queried min coordinates: x [1266..],
y [1162..]
[  301.553423] Generic FE-GE Realtek PHY r8169-0-500:00: attached PHY driver
(mii_bus:phy_addr=r8169-0-500:00, irq=MAC)
[  301.590802] usb 5-3: New USB device found, idVendor=06cb, idProduct=00bd,
bcdDevice= 0.00
[  301.590815] usb 5-3: New USB device strings: Mfr=0, Product=0,
SerialNumber=1
[  301.590821] usb 5-3: SerialNumber: f699a1169720
[  301.700442] Bluetooth: hci0: RTL: fw version 0xd9b88207
[  301.757826] r8169 0000:05:00.0 enp5s0: Link is Down
[  301.824556] Bluetooth: MGMT ver 1.22
[  305.674822] wlp3s0: authenticate with e4:bf:fa:cc:15:70
[  305.674836] wlp3s0: Invalid HE elem, Disable HE
[  305.800382] wlp3s0: send auth to e4:bf:fa:cc:15:70 (try 1/3)
[  305.802262] wlp3s0: authenticated
[  305.805269] wlp3s0: associate with e4:bf:fa:cc:15:70 (try 1/3)
[  305.806658] wlp3s0: RX AssocResp from e4:bf:fa:cc:15:70 (capab=0x1011
status=0 aid=3)
[  305.917751] wlp3s0: associated
[  305.917962] wlp3s0: Limiting TX power to 23 (23 - 0) dBm as advertised by
e4:bf:fa:cc:15:70
[  305.985550] IPv6: ADDRCONF(NETDEV_CHANGE): wlp3s0: link becomes ready
[  316.051610] audit: type=1400 audit(1668405359.412:35): apparmor="DENIED"
operation="open" profile="/usr/sbin/cups-browsed"
name="/proc/sys/net/ipv6/conf/all/disable_ipv6" pid=1948 comm="cups-browsed"
requested_mask="r" denied_mask="r" fsuid=0 ouid=0
[  316.101113] audit: type=1400 audit(1668405359.460:36): apparmor="DENIED"
operation="open" profile="/usr/sbin/cups-browsed"
name="/proc/sys/net/ipv6/conf/all/disable_ipv6" pid=1948 comm="cups-browsed"
requested_mask="r" denied_mask="r" fsuid=0 ouid=0
[  316.110480] audit: type=1400 audit(1668405359.472:37): apparmor="DENIED"
operation="open" profile="/usr/sbin/cups-browsed"
name="/proc/sys/net/ipv6/conf/all/disable_ipv6" pid=1948 comm="cups-browsed"
requested_mask="r" denied_mask="r" fsuid=0 ouid=0
[  316.119295] audit: type=1400 audit(1668405359.480:38): apparmor="DENIED"
operation="open" profile="/usr/sbin/cups-browsed"
name="/proc/sys/net/ipv6/conf/all/disable_ipv6" pid=1948 comm="cups-browsed"
requested_mask="r" denied_mask="r" fsuid=0 ouid=0
[  334.857310] Bluetooth: \x05: unknown dev_type 141
[  334.857335] BUG: kernel NULL pointer dereference, address: 0000000000000102
[  334.857339] #PF: supervisor read access in kernel mode
[  334.857343] #PF: error_code(0x0000) - not-present page
[  334.857346] PGD 0 P4D 0 
[  334.857351] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  334.857356] CPU: 12 PID: 1382 Comm: krfcommd Not tainted 6.0.0-rc7+ #1
[  334.857360] Hardware name: LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W (1.21
) 09/15/2022
[  334.857364] RIP: 0010:__queue_work+0x1c/0x460
[  334.857376] Code: 8f 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00
41 57 41 56 41 55 41 89 fd 41 54 49 89 f4 55 53 48 89 d3 48 83 ec 08 <f6> 86 02
01 00 00 01 0f 85 e1 02 00 00 e8 42 e4 06 00 45 89 ee 41
[  334.857379] RSP: 0018:ffffc16dcc66fc40 EFLAGS: 00010082
[  334.857383] RAX: 0000000000000282 RBX: ffff9ecde6f2b488 RCX:
0000000000000000
[  334.857385] RDX: ffff9ecde6f2b488 RSI: 0000000000000000 RDI:
0000000000002000
[  334.857387] RBP: ffffc16dcc66fd10 R08: 0000000000000000 R09:
ffffc16dcc66fa58
[  334.857389] R10: 0000000000000003 R11: ffffffffa3ad16a8 R12:
0000000000000000
[  334.857391] R13: 0000000000002000 R14: ffff9ecd809e4e00 R15:
ffff9ecdb3282400
[  334.857393] FS:  0000000000000000(0000) GS:ffff9ed392100000(0000)
knlGS:0000000000000000
[  334.857396] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  334.857399] CR2: 0000000000000102 CR3: 000000042b410000 CR4:
0000000000750ee0
[  334.857401] PKRU: 55555554
[  334.857403] Call Trace:
[  334.857408]  <TASK>
[  334.857416]  queue_work_on+0x37/0x40
[  334.857426]  l2cap_chan_send+0x12f/0xc60 [bluetooth]
[  334.857483]  ? remove_wait_queue+0x20/0x60
[  334.857489]  ? _raw_spin_unlock_irqrestore+0x23/0x40
[  334.857497]  ? preempt_count_add+0x6a/0xa0
[  334.857503]  l2cap_sock_sendmsg+0x9a/0x100 [bluetooth]
[  334.857539]  sock_sendmsg+0x5f/0x70
[  334.857548]  rfcomm_send_frame+0x62/0xa0 [rfcomm]
[  334.857562]  rfcomm_send_disc.isra.0+0x80/0xd0 [rfcomm]
[  334.857570]  __rfcomm_dlc_disconn+0x10a/0x120 [rfcomm]
[  334.857577]  __rfcomm_dlc_close+0x60/0x200 [rfcomm]
[  334.857583]  rfcomm_run+0x6f6/0x1900 [rfcomm]
[  334.857591]  ? _raw_spin_rq_lock_irqsave+0x20/0x20
[  334.857596]  ? rfcomm_check_accept+0xa0/0xa0 [rfcomm]
[  334.857602]  kthread+0xe9/0x110
[  334.857608]  ? kthread_complete_and_exit+0x20/0x20
[  334.857613]  ret_from_fork+0x22/0x30
[  334.857622]  </TASK>
[  334.857623] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE
nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables libcrc32c nfnetlink
br_netfilter bridge stp llc nvme_fabrics uinput ctr ccm rfcomm snd_seq_dummy
snd_hrtimer snd_seq snd_seq_device qrtr overlay cpufreq_ondemand
cpufreq_powersave cpufreq_conservative cmac cpufreq_userspace algif_hash
algif_skcipher zstd af_alg zstd_compress bnep zram zsmalloc binfmt_misc
nls_ascii nls_cp437 vfat fat btusb btrtl btbcm btintel btmtk bluetooth
snd_ctl_led snd_hda_codec_realtek snd_hda_codec_generic rtw89_8852ae
rtw89_8852a snd_hda_codec_hdmi intel_rapl_msr intel_rapl_common rtw89_pci
uvcvideo snd_soc_dmic snd_acp3x_pdm_dma snd_acp3x_rn jitterentropy_rng
rtw89_core snd_hda_intel videobuf2_vmalloc snd_soc_core videobuf2_memops
videobuf2_v4l2 snd_intel_dspcfg snd_hda_codec kvm_amd snd_pci_acp6x drbg
videobuf2_common snd_hwdep mac80211 wmi_bmof snd_pci_acp5x
[  334.857705]  ansi_cprng kvm libarc4 videodev irqbypass snd_rn_pci_acp3x
snd_hda_core ecdh_generic snd_acp_config mc rapl ecc pcspkr thinkpad_acpi
snd_soc_acpi ccp snd_pcm cfg80211 snd_pci_acp3x nvram rng_core ledtrig_audio
snd_timer sp5100_tco platform_profile ucsi_acpi k10temp watchdog snd typec_ucsi
roles soundcore rfkill typec wmi ac battery video button evdev joydev serio_raw
amd_pstate msr parport_pc ppdev lp parport fuse configfs efi_pstore efivarfs
ip_tables x_tables autofs4 ext4 crc32c_generic crc16 mbcache jbd2 dm_crypt
dm_mod amdgpu crc32_pclmul crc32c_intel drm_ttm_helper ttm ghash_clmulni_intel
gpu_sched nvme i2c_algo_bit drm_buddy nvme_core rtsx_pci_sdmmc xhci_pci
drm_display_helper t10_pi mmc_core xhci_hcd r8169 drm_kms_helper realtek
crc64_rocksoft_generic aesni_intel crc64_rocksoft mdio_devres drm crc_t10dif
crypto_simd usbcore psmouse cec cryptd crct10dif_generic libphy rc_core
crct10dif_pclmul i2c_piix4 rtsx_pci usb_common crc64 crct10dif_common i2c_scmi
sha512_ssse3
[  334.857807]  sha512_generic
[  334.857814] CR2: 0000000000000102
[  334.857817] ---[ end trace 0000000000000000 ]---
[  334.861275] RIP: 0010:__queue_work+0x1c/0x460
[  334.861275] Code: 8f 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00
41 57 41 56 41 55 41 89 fd 41 54 49 89 f4 55 53 48 89 d3 48 83 ec 08 <f6> 86 02
01 00 00 01 0f 85 e1 02 00 00 e8 42 e4 06 00 45 89 ee 41
[  334.861275] RSP: 0018:ffffc16dcc66fc40 EFLAGS: 00010082
[  334.861275] RAX: 0000000000000282 RBX: ffff9ecde6f2b488 RCX:
0000000000000000
[  334.861275] RDX: ffff9ecde6f2b488 RSI: 0000000000000000 RDI:
0000000000002000
[  334.861275] RBP: ffffc16dcc66fd10 R08: 0000000000000000 R09:
ffffc16dcc66fa58
[  334.959941] R10: 0000000000000003 R11: ffffffffa3ad16a8 R12:
0000000000000000
[  334.959941] R13: 0000000000002000 R14: ffff9ecd809e4e00 R15:
ffff9ecdb3282400
[  334.959941] FS:  0000000000000000(0000) GS:ffff9ed392100000(0000)
knlGS:0000000000000000
[  334.959941] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  334.959941] CR2: 0000000000000102 CR3: 0000000161a42000 CR4:
0000000000750ee0
[  334.959941] PKRU: 55555554
[  350.116698] BUG: unable to handle page fault for address: ffffc16dcc66feb0
[  350.116706] #PF: supervisor read access in kernel mode
[  350.116709] #PF: error_code(0x0000) - not-present page
[  350.116712] PGD 100000067 P4D 100000067 PUD 1001a4067 PMD 106ffa067 PTE 0
[  350.116717] Oops: 0000 [#2] PREEMPT SMP NOPTI
[  350.116721] CPU: 4 PID: 860 Comm: kworker/u33:1 Tainted: G      D           
6.0.0-rc7+ #1
[  350.116724] Hardware name: LENOVO 21A00004GE/21A00004GE, BIOS R1MET51W (1.21
) 09/15/2022
[  350.116727] Workqueue: hci0 hci_rx_work [bluetooth]
[  350.116759] RIP: 0010:__wake_up_common+0x4c/0x180
[  350.116768] Code: 24 0c 89 4c 24 08 4d 85 c9 74 0a 41 f6 01 04 0f 85 a3 00
00 00 48 8b 43 08 4c 8d 40 e8 48 83 c3 08 49 8d 40 18 48 39 c3 74 5b <49> 8b 40
18 31 ed 4c 8d 70 e8 45 8b 28 41 f6 c5 04 75 5f 49 8b 40
[  350.116770] RSP: 0018:ffffc16dc2777ce0 EFLAGS: 00010002
[  350.116773] RAX: ffffc16dcc66feb0 RBX: ffffffffc18440a8 RCX:
0000000000000000
[  350.116775] RDX: 0000000000000000 RSI: 0000000000000003 RDI:
ffffffffc18440a0
[  350.116777] RBP: 0000000000000246 R08: ffffc16dcc66fe98 R09:
ffffc16dc2777d30
[  350.116778] R10: ffff9ecdb3282421 R11: 00000000dd721946 R12:
ffffc16dc2777d30
[  350.116780] R13: 0000000000000000 R14: 0000000000000000 R15:
0000000000000000
[  350.116781] FS:  0000000000000000(0000) GS:ffff9ed391f00000(0000)
knlGS:0000000000000000
[  350.116784] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  350.116785] CR2: ffffc16dcc66feb0 CR3: 000000042b410000 CR4:
0000000000750ee0
[  350.116787] PKRU: 55555554
[  350.116789] Call Trace:
[  350.116794]  <TASK>
[  350.116800]  __wake_up_common_lock+0x7b/0xc0
[  350.116805]  hci_encrypt_change_evt+0x160/0x4e0 [bluetooth]
[  350.116835]  ? hci_cs_read_remote_features+0x1e0/0x1e0 [bluetooth]
[  350.116859]  hci_event_packet+0x3ad/0x570 [bluetooth]
[  350.116884]  hci_rx_work+0x9c/0x580 [bluetooth]
[  350.116909]  process_one_work+0x1c7/0x380
[  350.116913]  worker_thread+0x4d/0x380
[  350.116916]  ? rescuer_thread+0x3a0/0x3a0
[  350.116918]  kthread+0xe9/0x110
[  350.116922]  ? kthread_complete_and_exit+0x20/0x20
[  350.116925]  ret_from_fork+0x22/0x30
[  350.116931]  </TASK>
[  350.116932] Modules linked in: xt_conntrack nft_chain_nat xt_MASQUERADE
nf_nat nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4
xfrm_user xfrm_algo xt_addrtype nft_compat nf_tables libcrc32c nfnetlink
br_netfilter bridge stp llc nvme_fabrics uinput ctr ccm rfcomm snd_seq_dummy
snd_hrtimer snd_seq snd_seq_device qrtr overlay cpufreq_ondemand
cpufreq_powersave cpufreq_conservative cmac cpufreq_userspace algif_hash
algif_skcipher zstd af_alg zstd_compress bnep zram zsmalloc binfmt_misc
nls_ascii nls_cp437 vfat fat btusb btrtl btbcm btintel btmtk bluetooth
snd_ctl_led snd_hda_codec_realtek snd_hda_codec_generic rtw89_8852ae
rtw89_8852a snd_hda_codec_hdmi intel_rapl_msr intel_rapl_common rtw89_pci
uvcvideo snd_soc_dmic snd_acp3x_pdm_dma snd_acp3x_rn jitterentropy_rng
rtw89_core snd_hda_intel videobuf2_vmalloc snd_soc_core videobuf2_memops
videobuf2_v4l2 snd_intel_dspcfg snd_hda_codec kvm_amd snd_pci_acp6x drbg
videobuf2_common snd_hwdep mac80211 wmi_bmof snd_pci_acp5x
[  350.116993]  ansi_cprng kvm libarc4 videodev irqbypass snd_rn_pci_acp3x
snd_hda_core ecdh_generic snd_acp_config mc rapl ecc pcspkr thinkpad_acpi
snd_soc_acpi ccp snd_pcm cfg80211 snd_pci_acp3x nvram rng_core ledtrig_audio
snd_timer sp5100_tco platform_profile ucsi_acpi k10temp watchdog snd typec_ucsi
roles soundcore rfkill typec wmi ac battery video button evdev joydev serio_raw
amd_pstate msr parport_pc ppdev lp parport fuse configfs efi_pstore efivarfs
ip_tables x_tables autofs4 ext4 crc32c_generic crc16 mbcache jbd2 dm_crypt
dm_mod amdgpu crc32_pclmul crc32c_intel drm_ttm_helper ttm ghash_clmulni_intel
gpu_sched nvme i2c_algo_bit drm_buddy nvme_core rtsx_pci_sdmmc xhci_pci
drm_display_helper t10_pi mmc_core xhci_hcd r8169 drm_kms_helper realtek
crc64_rocksoft_generic aesni_intel crc64_rocksoft mdio_devres drm crc_t10dif
crypto_simd usbcore psmouse cec cryptd crct10dif_generic libphy rc_core
crct10dif_pclmul i2c_piix4 rtsx_pci usb_common crc64 crct10dif_common i2c_scmi
sha512_ssse3
[  350.117065]  sha512_generic
[  350.117069] CR2: ffffc16dcc66feb0
[  350.117071] ---[ end trace 0000000000000000 ]---
[  350.120656] RIP: 0010:__queue_work+0x1c/0x460
[  350.120656] Code: 8f 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 0f 1f 44 00 00
41 57 41 56 41 55 41 89 fd 41 54 49 89 f4 55 53 48 89 d3 48 83 ec 08 <f6> 86 02
01 00 00 01 0f 85 e1 02 00 00 e8 42 e4 06 00 45 89 ee 41
[  350.120656] RSP: 0018:ffffc16dcc66fc40 EFLAGS: 00010082
[  350.120656] RAX: 0000000000000282 RBX: ffff9ecde6f2b488 RCX:
0000000000000000
[  350.120656] RDX: ffff9ecde6f2b488 RSI: 0000000000000000 RDI:
0000000000002000
[  350.120656] RBP: ffffc16dcc66fd10 R08: 0000000000000000 R09:
ffffc16dcc66fa58
[  350.120656] R10: 0000000000000003 R11: ffffffffa3ad16a8 R12:
0000000000000000
[  350.120656] R13: 0000000000002000 R14: ffff9ecd809e4e00 R15:
ffff9ecdb3282400
[  350.120656] FS:  0000000000000000(0000) GS:ffff9ed391f00000(0000)
knlGS:0000000000000000
[  350.120656] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  350.120656] CR2: ffffc16dcc66feb0 CR3: 0000000206866000 CR4:
0000000000750ee0
[  350.120656] PKRU: 55555554
[  350.120656] note: kworker/u33:1[860] exited with preempt_count 1

```

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You are the assignee for the bug.

[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #13 from frc.gabriel@gmail.com ---
Created attachment 303172
  --> https://bugzilla.kernel.org/attachment.cgi?id=303172&action=edit
btmon file when the computer crashed running kernel from bluetooth-next master
branch HEAD

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You may reply to this email to add a comment.

You are receiving this mail because:
You are the assignee for the bug.

[Bug 216686] BUG: kernel NULL pointer dereference, address: 0000000000000680

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=216686

--- Comment #14 from frc.gabriel@gmail.com ---
I noticed these messages after a some minutes:

```
[  350.120656] note: kworker/u33:1[860] exited with preempt_count 1
[ 1873.559221] wlp3s0: deauthenticating from e4:bf:fa:cc:15:70 by local choice
(Reason: 3=DEAUTH_LEAVING)
[ 1877.096203] PM: suspend entry (deep)
[ 1877.106898] Filesystems sync: 0.010 seconds
[ 1879.113564] Bluetooth: hci0: Opcode 0x c1a failed: -110
[ 1881.129302] Bluetooth: hci0: Opcode 0x2042 failed: -110
[ 1881.129327] Bluetooth: hci0: Unable to disable scanning: -110
[ 1883.145290] Bluetooth: hci0: Opcode 0x 406 failed: -110
[ 1885.161292] Bluetooth: hci0: Opcode 0x c01 failed: -110
[ 1887.177319] Bluetooth: hci0: Opcode 0x2042 failed: -110
[ 1887.177330] Bluetooth: hci0: Unable to disable scanning: -110
[ 1887.177335] Bluetooth: hci0: disable scanning failed: -110
[ 1887.177337] Bluetooth: hci0: start background scanning failed: -110
```

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